What Does the Blinking Light on My Furnace Mean?
The blinking light on a furnace is a fault code from the control board. How to read it safely, what common codes mean, and when a reset is fine or not.
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Furnace Repair in Scandia, MN
We fix gas and propane furnaces all over Scandia, and you don't pay the $79 trip charge if you approve the repair. The repair price is flat and in writing before any work, and we book calls 7am–9pm, seven days a week. Many homes here burn propane, since gas mains don't reach every road.
Furnace repair calls in Scandia homes
Out past the gas mains, a Scandia no-heat call can start at the propane tank rather than the furnace. A regulator whose vent iced over, a tank that ran low in a cold snap, or air in the line after a run-out all look like a dead furnace from the living room. Once the fuel supply checks out, the failures match any Minnesota furnace: flame sensors, igniters, inducer motors, pressure switches and limit trips from a clogged filter.
Most 1970s houses here are on a replacement furnace by now, and some still vent furnace and water heater up one masonry chimney, so we test draft before we leave. Converted cabins tuck furnaces into closets and crawlspaces, which slows access more than diagnosis. Homes on Connexus Energy's dual-fuel rate add one more check: the outdoor sensor and thermostat settings that switch the house from heat pump to furnace when the co-op interrupts the heat pump.
Updated September 26, 2026
How much does furnace repair cost in Scandia?
Every furnace repair call in Scandia starts with a $79 trip charge, waived when you approve the repair, and a written price before any work. Same prices in Scandia as in every town we serve. National averages (HomeGuide, 2026), not our prices: an igniter $100–$250, a flame sensor $80–$250, a pressure switch $150–$400. More in the furnace repair cost guide.
Signs your furnace needs a technician
- The inducer starts, the igniter glows, then the burners never light
- The burners light for a few seconds and shut off, over and over
- The furnace runs but the vents blow cool air
- A blinking code on the control board, or the furnace has locked out
- Your CO alarm went off or the burner flames look lazy and yellow
- New banging, squealing or grinding when the furnace starts
- Water pooling around a high-efficiency furnace
More detail on our furnace repair page.
Symptom guides: Blowing cold air · Won't ignite · Short cycling · Blinking light codes · Pressure switch trips · Strange noises · Leaking water · Burning smell · Red tag · Carbon monoxide
Furnace repair in Scandia: questions
We ran out of propane at our Scandia place. What has to happen before the furnace runs again?
First the supplier refills the tank and checks the system, since air gets into the lines when a tank runs dry. Then the furnace needs attention: its burners won't light on air, and after its retries the ignition control locks out. We purge the line at the furnace, confirm the manifold pressure matches the furnace's propane setting and watch a full heating cycle. The furnace itself is usually fine.
Our converted cabin in Scandia keeps tripping the furnace's high limit. What causes that?
Almost always airflow. Cabins converted to year-round use often ended up with a furnace in a closet, short duct runs sized for a summer place and one small return. The blower can't move enough air across the heat exchanger, it overheats, and the burners shut off on the high-limit switch. Static pressure and temperature rise readings show how starved it is. The fix is usually a bigger return, a better filter setup or duct changes, not new parts.
More in Scandia
- Furnace replacement in Scandia
- AC repair in Scandia
- AC replacement in Scandia
- All HVAC service in Scandia
Furnace repair near Scandia
- Forest Lake, MN 9 mi
- Hugo, MN 10 mi
- Grant, MN 13 mi
- Columbus, MN 13 mi
- Centerville, MN 14 mi
- Stillwater, MN 14 mi
Brands we repair
Guides on furnace repair
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What AFUE measures, the gas math from 80% to 96% to 98% using your own bill, and what a 98% furnace really buys you in a cold Minnesota house.
Read the guideWhat Size Furnace Do I Need for a Minnesota House?
Furnace size comes from a Manual J heat loss at a -15°F design day, not square feet. Input vs output BTU, AFUE, why old furnaces run big and what to ask for.
Read the guideContact Us
Furnace repair in Scandia? Call or send a request.